Lubricator



Nirn"gSrAfrns A'rRNTf LUBRIOATOR.'

srncuicarron forming part ofmecters Patent nacemos, dated June" 6, ieeegf y f Applicant naarmate 5,1398. sentiments-s. cantan To al@ whom llt-may concern/:

Be it known that I, GEORGEA J. MILLER, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented .certain new andpnsefl Improvements in Lubricators, of nxhiehlielte following is a specification.

This invention relates to that class of lubricators known in the art as force-feed 1ubricators, in which the lubricant is forced by pressure -into the bearing, and the invention is designed more particularly for lubricating bearings which have movement, such as bearings of connectingrods or crank-pins of engines. Heretofore in .lubricators of this class wherein presser heads or pistons are em` ployed engineers have been considerably an noyed by the shaking loose of these pistons caused by the rapid motion of the part to 'which the lubricator is attached, and this shaking loose and constant rattling of the pistons causes the parts to wear to the extent that has compelled the renewal of parts after only ten days use. p

The object of my invention, therefore, is to produce a lubricator which is simple and cheap and which at the sameA time will avoid these objections. p

The invention is illustrated in the accompanying drawings, in ,whichv t Figure l is a perspective view of the lubricator, and Figf a sectional view of the cup and cap and shows the -presser in the operative position. v l

In the drawings, A designates the lubricant receptacle vor cup and is provided on its inside surface with screw-threads a. A discharge-nozzle b projects from the bottom of the cup A and has screw-threads b' on its ex# ables it to be easily turned.

tcrior surface. This screw-threaded nozzle is screwed into and conveys the lubricant to the bearing. A screw-threaded presser-head c is located within the cup and engages the threads a, so that it can be screwed up or down. A loose cap f sits on the top rim of the cup and has a central bore screw-threaded.V Said cap has a milled edgef', which en- A stem d is rigidly attached to and projects up from the presser-head c and is provided at its upper end with a milled head d', which serves as a conse, nient means for revolving the stem and hea This stem d is provided with scrow threads e, which fit the screw-threaded bore in the loose cap, and said threads are of a different pit-eh or coarser from the thread a of the head and cup. The purpose of this relative difference of-screw-threads will presently be I pointed out. h

- The operation of the luhricatorf is simple.

The cup A is first filled with theflubricanty (grease,) and the presser-head 'c 'is then screweddown a little into the cup by means of the milled head d' on the 'stem to place the lubricant under compression; i The cap f up to this time has, had the raised position shown by broken lines in Fig. 2, but is now screwed down on the stern d until it is firmly seated'on the top rim of the cnp'A. Now as the stom r1 and cap f are connected by a screw-thread e of a dierent pitch from this screw-th read a, which connects the presserA head e andcup A, the effect is that tec f acts as a lock-nut to the presser-licad c, and the latter is locked securely from movente-nt' either 'up or down and cannot shake loose or rattle and wear the parts, as has been found so objectionable heretofore in lubricators of this class.v The reason that the cap f in this construction acts as a lock-nut and prevents the presser-head or piston c from shaking loose is that the stem and presser-head are rigidly connected and that the threads on the stem being eoarser than those on the presserhead the stein must advance or retract faster than the presser-head, and any rotation of the presser-head would cause a much less back movement of the presser-head relative to the cupA than the back movement of the A i stem relative to the cap f,.and any rotation,

therefore, would serve to draw the cap f still 1;.,

more tightlyon the toprim ofthe cup. f Hence it serves as a lock-nnt. Even if the lubricant (the grease) should all pass out from under the presser-head c the latter can -move neither ldown nor up because of the relative difference between the two screw-threads.

'Having thus described my invention, what l claim as new, and desire to secure by Letters Patent of the United States, is

1'. In a lubricator the combination of an internally-threaded cup provided in its bottom with an outlet; a presser-head provided with screw e threads vand working in the cup; a

be raised or lowered on the threads thereof and to seat loosely on the top rim of the cup, 15 whereby said cap may be screwed down and seat on the rim edge of the oop and prevent 'the presser-head from turning either up or down as set forth. I

`In testimony whereof I affix my signature 2o in the presence of two Witnesses.

- GEORG-E J. MILLER.

Witnesses: v

CHARLES B. MANN, Jr., LEE 1. VAN HORN. 

